Parasite comb

ABSTRACT

A comb to collect and subsequently crush parasite having a body having a handleable portion, a row of closely spaced teeth projecting outwardly from the body, and a crusher engaged to one of the teeth or handle. The teeth are configured to collect the parasites when combed through hair, and the teeth present upper surfaces that form a planar first face. The crusher has at least one planar crushing surface configured to move to abut against the first face of the teeth to cause the parasites to be crushed between the at least one crushing surface and the first face of the teeth.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to New Zealand Patent Application No. NZ 723179, entitled Parasite Comb, filed Aug. 11, 2016, the disclosure of which is hereby incorporated by reference in its entirety.

TECHNICAL FIELD

The present invention relates to a parasite comb. More particularly but not exclusively it relates to parasite comb for collecting and crushing fleas.

BACKGROUND

A variety of combs having various features for collecting parasites such as fleas and lice are known. These collecting combs merely separate the parasites from the hair of a subject. The parasites are collected by not being able to pass through the fine gaps between the teeth as the teeth of the comb are passed through hair. The parasites are moved along with the comb in front of the teeth until the end of the combing stroke.

A problem with conventional combs, such as flea comb, is that at the end of the combing stroke the fleas are able to jump off the teeth and resume their normal activity, albeit at a different location. Devices for trapping fleas are known such as U.S. Pat. No. 5,315,959 in which a debris-trapping shield is coupled to the handle. However the device described in U.S. Pat. No. 5,315,959 only traps fleas, sometimes only temporarily.

In this specification, where reference has been made to external sources of information, including patent specifications and other documents, this is generally for the purpose of providing a context for discussing the features of the present invention. Unless stated otherwise, reference to such sources of information is not to be construed, in any jurisdiction, as an admission that such sources of information are prior art or form part of the common general knowledge in the art.

It is an object of the present invention to provide a comb which overcomes or at least partially ameliorates some of the abovementioned disadvantages or which at least provides the public with a useful choice.

STATEMENTS OF INVENTION

In a first aspect the present invention may be said to broadly consist in a comb to collect and subsequently crush parasites, the comb comprising

-   -   a body having a handleable portion,     -   a row of closely spaced teeth projecting outwardly from the         body, the teeth configured to collect said parasites when combed         through hair,     -   a crusher engaged to one of the teeth or handle, the crusher         having at least one crushing surface configured to move to abut         against at least one of the body and teeth to cause the         parasites to be at least one of a) trapped and b) crushed         between the at least one crushing surface and at least one of         the body and teeth.

In one embodiment, the teeth define a first face of the row of teeth adjacent to a first crushing surface of said crusher.

In one embodiment, the first crushing surface and the first face are configured to crush parasites between them.

In one embodiment, the row of teeth comprises a base where the teeth meet the body.

In one embodiment, the crusher is flexible.

In one embodiment, the crusher is hingeable or flexible and configured to hinge or flex to abut the first face of the teeth.

In one embodiment, the crusher is hingeably engaged to one of the teeth or handle.

In one embodiment, the crusher comprises a hingeable or flexible portion.

In one embodiment, the crusher comprises a hingeable or flexible portion at or near, and parallel to, the base.

In one embodiment, the hingeable or flexible portion is a hinge intermediate the crusher and the body.

In one embodiment, the hinge is integral and/or a part of the crusher.

In one embodiment, the hinge is formed of pliable film.

In one embodiment, the hinge is a living hinge.

In one embodiment, the hinge is a pin type hinge.

In one embodiment, the hinge allows the crushing surface to fully abut flush with the upper surface of the teeth.

In one embodiment, the hinge allows the crusher hinge away from the teeth.

In one embodiment, the crusher has a crushing position where the crushing surface abuts the first face.

In one embodiment, the crusher has a resting position where the crushing surface does not abut the first face.

In one embodiment, the crusher is biased towards the first face.

In one embodiment, the crusher has a second crushing surface substantially parallel to the body.

In one embodiment, the body comprises an opposite surface opposite the second crushing surface.

In one embodiment, the second crushing surface cooperates with an opposite surface of the body to crush any parasites therebetween.

In one embodiment, the second crushing surface is offset from the opposite surface and is manipulatable towards and away from the opposite surface.

In one embodiment, the second crushing surface acts to crush parasites between the second crushing surface and the opposite surface.

In one embodiment, the hingeable or flexible portion is intermediate the second crushing surface and the opposite surface to allow the second crushing surface to rotate or pivot relative the opposite surface.

In one embodiment, the hingeable or flexible portion allows a nut cracker type movement to crush said parasites between the second crushing surface and opposite surface.

In one embodiment, the crusher is configured for a mechanical advantage to crush parasites between the second crushing surface and opposite surface.

In one embodiment, the first crushing surface is within 2 millimetres from the first face at a resting position.

In one embodiment, the first crushing surface abuts the upper side of the teeth at a crushing position.

In one embodiment, the crushing surface has protruding ribs extending towards the teeth, the ribs having an elongate length substantially parallel to the elongate direction of the teeth.

In one embodiment, the protruding ribs protrude intermediate each tooth of the row of teeth.

In one embodiment, the crushing surface has protruding ribs extending towards the teeth, the ribs having an elongate length substantially perpendicular to the elongate teeth.

In one embodiment, the comb comprises a shim directly adjacent at least a portion of the first face of the teeth.

In one embodiment, the shim comprises a third crushing surface between the shim and the first crushing surface of the crusher.

In one embodiment, the shim projects outwardly from the body, flush with the first face of the teeth.

In one embodiment, the shim is integral with the body.

In one embodiment, the crusher is configured to scrape or drive parasites from the first face and/or the shim towards one or more of the first, second and third crushing surface.

In one embodiment, the crusher is integral with the handle.

In one embodiment, the crusher is rigid.

In one embodiment, the crusher has a distal surface opposite to the second crushing surface at or towards the distal end of the teeth.

In one embodiment, the crusher's distal surface is flush with ends of teeth.

In one embodiment, the crusher's distal surface is before the ends of the teeth.

In one embodiment, the crusher has two side surfaces at or towards each end of the row of teeth.

In one embodiment, one or more side surfaces are flush with each end of the row of teeth.

In one embodiment, one or more side surfaces are inner more than each end of the row of teeth.

In one embodiment, the comb comprises a like secondary crusher on the other side of the row of teeth, opposite the first crusher.

In one embodiment, the like secondary crusher is hingeable at or towards the row of teeth.

In one embodiment, the secondary crusher comprises a secondary hinge.

In one embodiment, the secondary hinge is configured to allow the secondary crusher to hinge back past an acute angle from the row of teeth.

In one embodiment, the secondary hinge is configured to allow the secondary crusher to hinge back past an obtuse angle from the row of teeth.

In one embodiment, the secondary hinge is configured to allow the secondary crusher to fold substantially back onto the body.

In one embodiment, the parasites are fleas.

In one embodiment, one or both of the first and second crusher comprise upper manipulable surface(s) on an opposite side to the first crushing surface to allow a user to manipulate the crushers towards and away from the first and/or second crushing surfaces.

In one embodiment, the manipulable surface is grippy.

In one embodiment, the row of teeth follows a curved path.

In one embodiment, the one or more crushers follow the curved path.

In an alternative embodiment, the crusher is a sliding crusher and slideably engaged to one of the teeth or handle.

In one embodiment, the sliding crusher slidably moves to abut against at least one of the body and teeth and at least trap and preferably crush said parasites.

In one embodiment, the sliding crusher is retractable with respect to the teeth.

In one embodiment, the sliding crusher comprises a sliding member that engages with the body.

In one embodiment, the sliding member is manipulable to be slid by the user.

In one embodiment, the sliding member engages with a complementary guide channel.

In one embodiment, the sliding member slides in a direction parallel to an elongate axis of a tooth of the row of teeth.

In one embodiment, the sliding member slides in a direction to move the sliding crusher's at least one crushing surface towards and away from adjacent the row of tooth.

In one embodiment, the sliding crusher has a retracted position where the sliding crusher's at least one crushing surface does not engage or abut with the row of teeth.

In one embodiment, the sliding crusher has an extended and position where the sliding crusher's at least one crushing surface engages and/or abuts with the row of teeth.

In one embodiment, the sliding crusher comprises a like second crushing surface as described above.

In one embodiment, the sliding crusher comprises a like third crushing surface as described above.

In one embodiment, there is a secondary sliding crusher on the opposite side of the row of teeth like the sliding crusher.

In one embodiment, the sliding crusher's first crushing surface is biased towards the row of teeth.

In one embodiment, the sliding crusher is able to be fully retract so as not to impede the passage of hair through the teeth in operation

In one embodiment, the first crushing surface abuts parallel to the body in the retracted position.

In one embodiment, the sliding crusher is spring operated to bias the sliding crusher towards its extended position.

In one embodiment, the comb comprises an operable detent to detain and release to release the spring powered sliding crusher.

In one embodiment, the body is composed of plastics.

In one embodiment, the crusher is composed of plastics.

In one embodiment, the comb is composed of plastics.

In an alternative embodiment, the body is composed of one or more of plastics, wood and metal.

In one embodiment, the crusher is composed of a material that lets at least some light through.

In one embodiment, the crusher comprises a region composed of a translucent or clear material.

In a second aspect the present invention may be said to broadly consist in a comb to collect and subsequently crush parasites, the comb comprising

-   -   a body having a handleable portion and an elongated teeth         receiving portion,     -   a row of closely spaced teeth projecting outwardly on a notional         plane from the teeth receiving portion, the teeth configured to         collect said parasites when the teeth are combed through hair,     -   a collecting crusher projecting outwardly from the elongated         teeth receiving portion and substantially parallel to the         notional plane; and     -   a crushing surface configured to crush parasites between either         the crusher and the teeth or the crusher and the body.

In one embodiment, the crushing surface is parallel to the notional plane to crush parasites between the teeth and the crusher.

In one embodiment, the crushing surface is perpendicular to the notional plane to crush parasites between the crusher and the body.

In one embodiment, a shim portion of the body extends out parallel to the notional plane.

In one embodiment, the crushing surface is parallel to the notional plane to crush parasites between the crusher and a shim.

In one embodiment, the shim is thin.

In one embodiment, the shim projects out from adjacent elongate teeth receiving portion to partially cover the teeth.

In one embodiment, the crusher extends the length of the row of teeth.

In one embodiment, the shim extends the same length as the crusher.

In one embodiment, the parasites are fleas.

In a third aspect the present invention may be said to broadly consist in a comb to collect and subsequently crush parasites, the comb comprising

-   -   a body having a handleable portion,     -   a row of closely spaced teeth projecting outwardly from the         body, the teeth configured to collect said parasites when combed         through hair,     -   a crusher engaged to one of the teeth or handle, the crusher         having at least one crushing surface configured to, upon         hinging, move to abut against at least one of the body and teeth         and at least trap said parasites.

In one embodiment, the crusher is configured to crush said parasites.

Other aspects of the invention may become apparent from the following description which is given by way of example only and with reference to the accompanying drawings.

As used herein the term “and/or” means “and” or “or”, or both.

As used herein “(s)” following a noun means the plural and/or singular forms of the noun.

The term “comprising” as used in this specification means “consisting at least in part of”. When interpreting statements in this specification which include that term, the features, prefaced by that term in each statement, all need to be present but other features can also be present. Related terms such as “comprise” and “comprised” are to be interpreted in the same manner.

This invention may also be said broadly to consist in the parts, elements and features referred to or indicated in the specification of the application, individually or collectively, and any or all combinations of any two or more of said parts, elements or features, and where specific integers are mentioned herein which have known equivalents in the art to which this invention relates, such known equivalents are deemed to be incorporated herein as if individually set forth.)

To those skilled in the art to which the invention relates, many changes in construction and widely differing embodiments and applications of the invention will suggest themselves without departing from the scope of the invention as defined in the appended claims. The disclosures and the descriptions herein are purely illustrative and are not intended to be in any sense limiting.

DESCRIPTION OF THE DRAWINGS

The invention will now be described by way of example only and with reference to the drawings in which:

FIG. 1: shows a front perspective view of a comb in the extended position.

FIG. 2: shows a side view of a comb of FIG. 1.

FIG. 3: shows a top view of a comb of FIG. 1.

FIG. 4: shows a front view of the comb of FIG. 1.

FIG. 5: shows a side view of the comb in use.

FIG. 6: shows a close-up side view of the teeth with the crusher in the extended position.

FIG. 7: shows a close-up side view of the teeth in a crushing position.

FIG. 8: shows a close-up side view of the teeth in another crushing position.

FIG. 9: shows a shows a close-up view of a comb with a shim.

FIG. 10: shows a rear perspective view of a comb with a shim and a crusher in an extended position.

FIG. 11: shows a side view of the comb with opposing crushers, one crusher in a folded back position and the other crusher in an extended position.

FIG. 12: shows a front perspective view of the comb of FIG. 11.

FIG. 13: shows a front perspective view of the comb of FIG. 11 with both crushers and extended positions.

FIG. 14A: shows a front perspective view of the sliding crusher in a retracted position.

FIG. 14B: shows a side view of FIG. 14A.

FIG. 15A: shows a front perspective view of the sliding crusher in a mid-point position.

FIG. 15B: shows a side view of FIG. 15A.

FIG. 16A: shows a front perspective view of the sliding crusher in an extended position.

FIG. 16B: shows a side view of FIG. 16A.

DESCRIPTION

With reference to the above drawings, in which similar features are generally indicated by similar numerals, a comb is generally indicated by the numeral 1000.

In one embodiment now described, there is provided a comb 1000 consisting of three parts. Firstly; a body 100 comprises a handle 101; secondly a row of closely spaced apart teeth 200 projecting out from the body 100 at an elongate teeth receiving portion 102; and thirdly a crusher 300 projecting out from the body 100 and adjacent the teeth receiving portion 102. When using the comb in operation the teeth 200 are pushed or drawn in a direction 7 through the hair 2 of a species 1, parasites 3 such as fleas 3 do not fit within the closely spaced gaps between the row of teeth 200 and as such are caught on the upper surfaces (also called the first face) of the teeth as shown in FIG. 5. The fleas 3 are then retained between the first face of the teeth and lower surface of the crusher 300. Once a combing stroke or multiple combing strokes have been completed then the crusher 300 is pushed onto the teeth to crush the retained fleas 3.

The body 100 comprises the handle 101 and the teeth receiving portion 102. The receiving portion 102 preferably is linear and may be notional—for example if the teeth are integral with the body. The handle 101 may be a comb handle in which the body is merely a flat surface that extends back from the teeth, or the handle may be off to the side of the teeth. The handle is not important to the use of invention. Many different handles are known in the comb industry. Different handles are often used for different purposes and a person skilled in the art will realise that a handle of a different configuration does not depart from the spirit of the invention.

The teeth 200 project out from the body on a notional plane 4 from the teeth receiving portion 102. The teeth are common to majority of flea combs publicly known. The teeth 200 may be rotatable or maybe differently shaped and spaced for different uses. The teeth comprise bases 201 at the teeth receiving portion 102, and each tooth has a point or tip 202 distal to the base 201. The row of teeth 200 comprises a first face 203 along one side of the row of teeth, for example if a flat sheet was laid upon the row of teeth 200 it would touch the upper surfaces 203 of the teeth 200. The teeth are preferably composed of metal however plastics may be used also. The teeth may be integrally formed with the body or maybe inserted into or attached to the body, or furthermore the body may be injection moulded about the teeth. The teeth may be cylindrical or they may be conical or frustoconical in shape, or they may be shaped elsewise as known in the art.

The crusher 300 projects out from the body 100 from adjacent the teeth receiving portion 102 to extend substantially over the top/adjacent to the row of teeth 200.

In one embodiment the crusher 300 has two positions; a resting position where the crusher is in a relaxed state, and a crushing position 6 where the crusher has been manipulated for crushing. Furthermore, the crusher 300 may have a third position 8 where the crusher is bent backwards or extended away from the teeth which happens during the combing process. This extended position may also be the resting position of the crusher 300. Having an extended resting position easily allows for the crusher to be bent back easily during combing. FIGS. 1 and 2 for example may show an extended position or a resting position.

In one embodiment, the crusher 300 is substantially parallel with the notional plane 4 of the teeth whilst in the resting position. In other embodiments, where the teeth are conical and the first face of the teeth are not parallel with the notional plane, then the crusher 300 may be substantially parallel with the plane formed by the first face of the row of teeth whilst in the resting position.

The crusher 300 comprises two surfaces, a lower first crushing surface 301 and an upper manipulable surface 302. The first crushing surface 301 is configured to abut the first face 203 of the row of teeth 200. The object of the crushing surface 301 is for the teeth to collect parasites, such as fleas 3, on the upper surfaces 203 of the teeth 200 so that the fleas 3 maybe trapped between the upper surfaces 203 and the first crushing surface 301. Once the fleas 3 have been collected a user may manipulate the manipulable surface 302 to effectively push the crusher 300 towards the upper surfaces 203 of the teeth 200 to crush the fleas 3 trapped between the first face 203 of the row of teeth 200 and the first crushing surface 301. The upper manipulable surface 302 in one embodiment is grippy to aid the user in manipulating the crusher 300 towards the teeth 200.

To allow the crusher 300 to be manipulated towards the teeth 200 the crusher 300 comprises a hingeable or flexible portion 304. This hingeable or flexible portion 304 is preferably intermediate the body 100 and the crusher 300. Preferably the hingeable or flexible portion 304 runs elongate with the teeth receiving portion 102. In a most preferred embodiment the crusher 300 itself is flexible over its entire area. Thus the crusher may be integrally attached to the body or joined to the body without a specific hinge joint but the crusher itself may be flexible enough to be moved to crush parasites upon the first face 203. In one embodiment the crusher may be described as a flap.

The hingeable or flexible portion 304 in another embodiment may be an isolated hinge that is intermediate the body 100 and the crusher 300. The hinge 304 may be of many different types as known in the art. These hinges 304 may include pin and slot type hinges, living hinges, resilient, pliable or flexible portions that are integral with the crusher or other alternatives. As long as the crusher 300 is able collect fleas 3 in a first position between the first face 203 and the first crushing surface 301 and in a second position be able to move to crush fleas 3 between the first crushing surface 301 and the first face 203. In embodiments where there is a specific isolated hinge or hingeable or flexible portion, the crusher 300 itself may rigid. The hinge allows the crushing surface to abut flush with the upper surface of the teeth. In an alternative embodiment the crusher 300 is not pivotally hinged but slidably movable instead.

The hingeable or flexible portion or hinge also allows the crusher 300 to bend backwards in operation to allow the comb 1000 to be used at angles other than a right angle with respect to the notional plane 4 and the surface of the species to be combed.

Preferably the first crushing surface 301 covers the first face 203 of the row of teeth 200. This allows the crushing surface 301 to collect, and be able to crush, any flea that is retained by any tooth/teeth. In alternative embodiments the crushing surface 201, or the side surfaces 203 of the crusher 300 may not extend to each end of the row of teeth 200. In this embodiment the crusher 300 is narrower than the elongate length of the row of teeth which allows the comb to be used for specific isolation and combing of particular areas. For example the comb with a narrow crusher may be used to capture individual and visible fleas 3 (not shown).

Following on from this idea the crusher's distal region or distal surface 305, opposite to the base of teeth 201, may not be flush with the ends or points 202 of the teeth. Preferably the distal surface 205 is flush with the points 202 so that all fleas 3 captured can be crushed. However the distal surface 305 may not be flush with the points 202 and it may extend past the points 202 or may fall short of the points 202.

In one embodiment the first crushing surface 301 is within 2 millimetres from the upper side of the teeth/first face 203 at a resting position 5. In other embodiments the first crushing surface 301 abuts the first face 203 when in the resting position 5. This is due to the crusher 300 being flexibly biased towards the teeth 200 in this embodiment.

The crusher 300 is preferably composed of plastics however other materials such as metal may be used also. Preferably the crusher 300 is plastic welded to the body, however in other embodiments it is integral with the body. Preferably, the body 100 is also composed of plastics. In other embodiments the body 100 may be made of wood or metal or another suitably rigid material.

In a preferred embodiment the crusher 300 is composed of a material that lets at least some light through. Preferably this material is translucent or clear. Preferably material is a clear plastics and allows the parasites, if present, to be observed between the teeth and the crushing surfaces. The sliding crusher, discussed below, is preferably made of a similar material to the hinged crusher 300. The sliding crusher however may have the sliding member being a rigid opaque plastics and the crushing head being translucent or clear.

In further embodiments, the crusher 300 comprises a second crushing surface 307 intermediate the body 100 and the crusher 300, and perpendicular to the notional plane 4 when the crusher 300 is in the resting position biased towards the teeth. The body 100 comprises a complimentary opposite surface 103 opposite the second crushing surface 307 adjacent the elongated teeth receiving portion as shown in FIGS. 6-8.

The second crushing surface 307 and the opposite surface 103 act together to crush parasites between the two surfaces 103 307 when crusher 300 is manipulated towards a direction substantially perpendicular to both said surfaces as shown in FIG. 8. The second crushing surface 307 acts as a second crushing surface to crush parasites between the second crushing surface and the opposite surface.

Prior to manipulation of the crusher 300, the second crushing surface 307 is offset from the opposite surface 103 as shown in FIG. 7. The crusher 300 is manipulable towards and away from the body 100. Any parasites they are caught up in the combing process tend to be pushed towards the base of the teeth by the hair of the animal and end up in-between the opposite and second crushing surfaces 103 307. The comb 1000 may comprise a separate hinge to allow the crusher 300 to move towards and away from the body in a direction parallel with the notional plane 4 that brings the second crushing surface 307 and opposite surfaces 103 together. In a preferred embodiment the comb 1000 uses the existing flexible hinge portion 304 to allow the second crushing surface 307 and opposite surfaces 307 to come together. Preferably the hingeable or flexible portion 304 is intermediate the second crushing surface 307 and the opposite surface 103 to allow the second crushing surface 307 to rotate or pivot, or flex towards, relative the opposite surface 103 to allow a nut cracker type movement to crush said parasites between the second crushing surface 307 and opposite surface 103. Alternatively the crusher may have a vertical movement only to crush parasites between the second crushing surface 307 and opposite surfaces.

The before and after vertical movement of the crusher can be seen in FIGS. 7 and 8. FIG. 7 shows the crusher before being manipulated towards the opposite surface 103. FIG. 8 shows the crusher manipulated onto the opposite surface 103. FIG. 7 and FIG. 8 also show the first crushing surface working against the teeth 200.

In a preferred embodiment the second crushing surface 307 is approximately 3 mm wide. However other embodiments where the second crushing surface 307 is between 0.5 and 7 mm wide is envisioned within the scope of the invention.

In a further embodiment the first crushing surface 301 has ribs 308 protruding towards the teeth 200, the ribs 308 having an elongate length substantially parallel in direction to the elongate teeth 200. The ribs 308 aid in crushing parasites by providing more surface area to the crushing surface 301 to come into contact with the first face 203, in turn reducing the places a parasite can avoid being crushed.

In one embodiment the ribs 308 are aligned so they are intermediate the teeth, i.e the ribs are aligned so they align up with the gaps between the teeth. In another embodiment the ribs 308 are aligned so they are aligned with the first face of the teeth. The ribs can be seen in FIGS. 12 and 13. The ribs may also be present on the single crusher as well as a double crusher comb—described later.

In another embodiment the ribs extend in a direction perpendicular to the elongate length of the teeth (not shown).

In a further embodiment the comb 1000 comprises a shim 400 intermediate the first face 203 and the first crushing surface 301, as shown in FIGS. 9 and 10. In a preferred embodiment the shim 400 abuts the first face 203. The shim aids in collecting and crushing fleas 3. As described previously when the comb 1000 is brushed through the hair 2 parasites 3 tend to collect at the base of the teeth. Such a shim 400 is introduced to collect the fleas 3 between the shim 400 and the crusher 300. The shim 400 has a third crushing surface 401 which is a complimentary surface to the first crushing surface 301. Collecting the fleas 3 between the first crushing surface 301 and third crushing surface 401 enables an area of greater surface to crush fleas 3 between (as there are no gaps between the teeth), compared to crushing between the first crushing surface 301 and the first face 203.

The shim 400 is thin so that the first crushing surface 301 is not prevented from abutting against the first face 203 of the teeth, so both the shim 400 and the teeth 200 are able to have fleas 3 crushed between them and the crusher 300. The shim is preferably composed of a thin sheet of plastic or metal. The shim may be integral or attached to the body. In an alternative embodiment the shim is integral with the teeth in which the bottom region of the teeth are all joined together to form a flat surface at their base towards the body (not shown).

The shim 400, opposite surface 103 and second crushing surface 307 provide sides to form a retention area to retain parasites in prior to crushing.

In a further embodiment the comb 1000 has a crusher on either side the teeth. One or more of these crushers is able to fold back flush against the body 100 to allow the crusher to get out of the way of hair 2 whilst combing. The two crushers are manipulable towards the teeth. The purpose of the two crushers is to increase the pressure on the fleas 3 during crushing.

In this embodiment a first crusher is similar to the crusher as described previously, and the secondary crusher is able to fold back upon itself. The secondary crusher 500 is hingeable at or towards, and parallel to, the elongated teeth receiving portion, adjacent the bases the row of teeth. The secondary crusher 500 has similar features as the first crusher 300, such as a secondary hinge et cetera. The secondary hinge 501 is able to hinge back past an acute angle with the notional plan 4. In a preferred embodiment the secondary hinge 501 allows the secondary crusher 500 to hinge back past an obtuse angle with the notional plane 4. The secondary hinge 501 in a further embodiment allows the secondary crusher to fold substantially back onto the body.

One or more of the crushers comprise crushing surfaces that face the teeth and have ribs as described previously. The ribs aid in crushing fleas 3 if the fleas 3 are intermediate the teeth and the crusher.

In an alternative embodiment the crusher is slidable and manipulable so it can move between a retracted position where the sliding crusher's first crushing surface is not adjacent the teeth and an extended position where the sliding crusher's first crushing surface is adjacent the row of teeth. The sliding crusher version 600 is shown in FIGS. 14-16. The sliding crusher 600 can be seen moving between a retracted position in FIGS. 14A and 14B to the extended position FIGS. 16A and 16B and a mid-point position in FIGS. 15A and 15B.

The sliding crusher 600 has similar crushing surfaces to the hinged crusher 300, such as the first crushing surface 608. The second and third crushing surfaces of the sliding crusher 600 are not specifically shown.

The sliding crusher 600 comprises the crushing head 601 and the sliding member 602. The sliding member 602 is slidable within a channel/recess/guide 604. The guide 604 guides the sliding member and head 601 towards and away from the row of teeth 200 in the direction 605. In its retracted position the head is adjacent the body 100 and the crushing surface 608 rests against the body 100 as shown in FIG. 14A.

Intermediate the sliding member 602 and the head 601 is a kinked region 606. The kinked region allows the head 601 to fully abut the row of teeth 200. The kinked region 606 allows the crushing surface 608 to come down on top of the row of teeth to crush parasites. The kinked region is just one way of enabling the sliding member to be on a different plane to the crushing surface, a skilled person in the art will realise the kinked region is not essential and there are many ways to configure the sliding crusher.

When the sliding crusher 600 is in its retracted the position the sliding member 602 up stands from the body 100 to allow the head 601 to rest upon the body. There are numerous ways of designing the sliding member 602 to slide within the body 100. In one embodiment, the sliding member or kinked region may be flexible. In such an embodiment the head 601 may be biased to push against the row of teeth 200. In one embodiment, the user when pushing the sliding member forward also pushes the sliding member 602 and hence the head 601 towards the teeth to apply the force of the user's finger through the sliding member and head 601 onto the teeth 200.

In the embodiment shown the sliding member has a cover 607 to cover the interface between the guide 604 and the sliding member 602. The cover 607 may be a retention plate or guide for the sliding member 602. There will be many ways a person skilled in the art will be able to retain the sliding member with the body, such as a groove and rail system not shown.

The sliding member may have gripping features 603 to aid the user in manipulating the sliding member 602.

The primary advantage of the disclosed invention is that the crusher 300 or 500 or 600 is able to abut either the shim or the surfaces of the teeth, or body to crush parasites between the crushers and the teeth or shim or body. Other combs may collect the parasites at the teeth but at the end of the brushing stroke the parasites are able to remove themselves from the teeth. The crushers of the current invention both retain and/or crush the parasites.

Where in the foregoing description reference has been made to elements or integers having known equivalents, then such equivalents are included as if they were individually set forth.

Although the invention has been described by way of example and with reference to particular embodiments, it is to be understood that modifications and/or improvements may be made without departing from the scope or spirit of the invention. 

What is claimed:
 1. A comb to collect and subsequently crush parasites, the comb comprising a body having a handleable portion, a row of closely spaced teeth projecting outwardly from the body, the teeth configured to collect said parasites when combed through hair, the teeth presenting upper surfaces which form a planar first face, a crusher engaged to one of the teeth or handle, the crusher having at least one planar crushing surface configured to move to abut against the first face of the teeth to cause the parasites to be crushed between the at least one crushing surface and the first face of the teeth.
 2. The comb as claimed in claim 1, wherein the teeth define a first face of the row of teeth adjacent to a first crushing surface of said crusher.
 3. The comb as claimed in claim 1, wherein the one (first) crushing surface and the first face are configured to crush parasites between them.
 4. The comb as claimed in claim 1, wherein the row of teeth comprises a base where the teeth meet the body.
 5. The comb as claimed in claim 2, wherein the crusher is flexible.
 6. The comb as claimed in claim 5, wherein the crusher is hingeable or flexible and configured to hinge or flex in order to be able to abut the first face of the teeth.
 7. The comb as claimed in claim 6, wherein the crusher is hingeably engaged to one of the teeth or handle.
 8. The comb as claimed in claim 1, wherein the crusher comprises a hingeable or flexible portion.
 9. The comb as claimed in claim 8, wherein the hingeable portion is a hinge.
 10. The comb as claimed in claim 9, wherein the hinge is integral of the crusher.
 11. The comb as claimed in claim 9, wherein the hinge allows the crushing surface to fully abut flush with the first face of the teeth.
 12. The comb as claimed in claim 1, wherein the crusher has a crushing position corresponding to the crushing surface abutting the first face.
 13. The comb as claimed in claim 1, wherein the crusher has a resting position where the crushing surface does not abut the first face.
 14. The comb as claimed in claim 1, wherein the crusher has a second crushing surface substantially parallel to a surface on the body.
 15. The comb as claimed in claim 14, wherein the second crushing surface cooperates with the surface of the body to crush any parasites therebetween.
 16. The comb as claimed in claim 14, wherein the crusher is manipulatable to crush parasites between the surface and second crushing surface.
 17. The comb as claimed in claim 2, wherein the comb comprises a shim directly adjacent at least a portion of the first face of the teeth.
 18. The comb as claimed in claim 17, wherein the shim comprises a third crushing surface presented to contact the first crushing surface of the crusher.
 19. The comb as claimed in claim 1, wherein the comb comprises a like secondary crusher on the other side of the row of teeth, opposite the first crusher.
 20. The comb as claimed in claim 1, wherein the crusher comprises a region composed of a translucent or clear material. 